Verhuellia is a segregate lineage in Piperaceae: more evidence from flower, fruit and pollen morphology, anatomy and development [PDF]
, 2010 Background and Aims The perianthless Piperales, i.e. Saururaceae and Piperaceae, have simple reduced flowers strikingly different from the other families of the order (e.g. Aristolochiaceae).
Samain, Marie-Stéphanie +7 more
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Some cytological, ecological and evolutionary aspects of pollination
Acta Societatis Botanicorum Poloniae, 2014 Different types of pollen dispersing units are described. The pollen of angiosperms may be dispersed in monads, tetrads, polyads, massulae or compact pollinia.
Ettore Pacini, Gian G. Franchi
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Evaluation of mitotic activity in tapetal cells of grapevine (Vitis L.)
Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 2021 The knowledge with reference to the grapevine tapetum has been centered on its anatomy/morphology and hardly anything at all is known about its mitotic activity throughout the microsporogenesis. The aim of this study was to ascertain the mitotic activity
Neiva Izabel PIEROZZI +1 more
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Frontiers in Plant Science, 2023 We aimed to investigate the genetic defects related to pollen development and infertility in NY2, a novel tetraploid rice germplasm known as Neo-tetraploid rice.
Nabieu Kamara +45 more
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The RiceTapetum Degeneration RetardationGene Is Required for Tapetum Degradation and Anther Development [PDF]
The Plant Cell, 2006 AbstractIn flowering plants, tapetum degeneration is proposed to be triggered by a programmed cell death (PCD) process during late stages of pollen development; the PCD is thought to provide cellular contents supporting pollen wall formation and to allow the subsequent pollen release.
Na, Li +14 more
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Biphasic regulation of the transcription factor ABORTED MICROSPORES (AMS) is essential for tapetum and pollen development in Arabidopsis [PDF]
, 2016 Viable pollen is essential for plant reproduction and crop yield. Its production requires coordinated expression at specific stages during anther development, involving early meiosis-associated events and late pollen wall formation.
Alexander +48 more
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Specialized ommatidia of the polarization-sensitive dorsal rim area in the eye of monarch butterflies have non-functional reflecting tapeta [PDF]
, 2009 Many insects exploit sky light polarization for navigation or cruising-course control. The detection of polarized sky light is mediated by the ommatidia of a small specialized part of the compound eye: the dorsal rim area (DRA).
Thomas Labhart +2 more
core +2 more sources
Tapetum Types and Forms in Angiosperms [PDF]
Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences., 2021 Abstract Based on the analysis of literature and our own data, we have suggested a new version of the typification of types and forms of the tapetum. It is proposed to distinguish two types of tapetum: parietal and periplasmodial.
Ivan I. Shamrov +2 more
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Extensive evolution of cereal ribosome-inactivating proteins translates into unique structural features, activation mechanisms, and physiological roles [PDF]
, 2017 Ribosome-inactivating proteins (RIPs) are a class of cytotoxic enzymes that can depurinate rRNAs thereby inhibiting protein translation. Although these proteins have also been detected in bacteria, fungi, and even some insects, they are especially ...
De Zaeytijd, Jeroen, Van Damme, Els
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Acta Societatis Botanicorum Poloniae, 2011 The phenomenon of male sterility has often been observed in investigations on the role of histone H1 in regulation of morphogenetic and cytological processes in transgenic tobacco plants.
Joanna Ślusarczyk +3 more
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